Something like that I'd polish with a flexhone or something similar, it's kind of depends on the material and how many you're doing. Do a couple, hone it, do a lot, ballsize or something similar.
Be careful. Honing will remove material and if it's as rough as it appears you might have to take off a lot to get it smooth. Might want to just take out the roughness first and see if there's any improvement.